This twin pack of Philips smart bulb works straight out of the box - just use the Philips Hue Bluetooth app on your phone to control up to 10 lights. Whether you want bright daylight vibes or soft glow for the night, its dimmable feature has you covered. You can just tell Alexa or Google Assistant to turn the lights on or off, so there's no need to get up or find your phone. Good to know - The 2700 K warm light gives off a chill, relaxing feel- With operating temperature from -20°C to 45°C, it's all good whether it's freezing cold or warm - Get full range of smart functions with a Hue Bridge - add more lights, control your lighting remotely, set schedules, and do much more_______________________________________________Please note: The Philips Hue Bridge (sold separately) is required for full smart functionality.